Pi Cubed is a visual math application for the iPhone, iPod touch, and iPad that lets you perform calculations as you would on a piece of paper. By using an animated, touch-based interface, even the most complex mathematical expressions can be entered and instantly evaluated. These expressions are typeset as they would be in a textbook or on a blackboard.

Calculations are entered and edited using simple touch operations. Standard gestures are supported, including pinch-zooming and finger swipes for scrolling.

Calculations can be stored for later retrieval or editing, and a library of over 150 equations ships with the application.

The free Pi Cubed Lite gives a taste of the functionality contained within the full application.

Molecules is an application for the iPhone and iPod touch that allows you to view three-dimensional renderings of molecules and manipulate them using your fingers. You can rotate the molecules by moving your finger across the display, zoom in or out by using two-finger pinch gestures, or pan the molecule by moving two fingers across the screen at once. The combination of the iPhone / iPod touch's unique multitouch input system and the built-in OpenGL ES 3D graphics capabilities enable you to feel like you are manipulating the molecules themselves with your fingers.

New molecules can be downloaded from the RCSB Protein Data Bank (http://www.rcsb.org/pdb), an international repository of biological molecules and their 3-D structures. Molecules can be downloaded directly to your handheld device and stored there for later viewing. Multiple visualization modes can be switched to by double-tapping on the 3-D rendering.

Sunset Lake Software is a one-man software company based in the state of Wisconsin (U.S.A.). My primary focus is on scientific applications, such as visualization clients or control software for analytical instruments.

I do almost all of my development in Cocoa, the native programming framework on Applecomputers and devices. I explain why elsewhere, but suffice it to say that I have had more fun and yet been more productive developing on Apple's platforms than in any other environment.

I invite you to stop by the blog, where you can read and comment on programming and scientific posts, or the forums, where you can join in on a discussion of the various software projects I'm working on. For more about me and my background, please visit the About the Author page.